FUEL REQUIREMENTSTecumseh Power Company strongly recommends the use of fresh, clean, unleaded regular gasoline in all Tecumsehengines. Unleaded gasoline burns cleaner, extends engine life, and promotes good starting by reducing the build-up ofcombustion chamber deposits. Leaded gasoline, gasohol containing no more than 10% ethanol, premium gasoline, orunleaded gasoline containing no more than 15% MTBE (Methyl Tertiary Butyl Ether), 15% ETBE (Ethyl Tertiary ButylEther) or 10% ethanol, can be used if unleaded regular gasoline is not available.Reformulated gasoline that is now required in several areas of the United States is also acceptable.NEVER USE: gasoline, fuel conditioners, additives or stabilizers containing methanol. The use of white gas, gasoholcontaining more than 10% ethanol, unleaded regular gasoline containing more than 15% MTBE (Methyl Tertiary ButylEther), 15% ETBE (Ethyl Tertiary Butyl Ether) or 10% ethanol is not recommended as engine/fuel system damage couldresult.See “STORAGE” instructions in Technician’s Manual, Operator’s Manual, or Bulletin 111.Tecumseh two-cycle oil part # 730227C contains a fuel stabilizer for year round fuel stability in and out of season. If oilother than Tecumseh two cycle is used, use Tecumseh's fuel stabilizer part # 730245.MIXING FUEL AND OILNEVER store engine with fuel in! WARNINGfuel tank inside a building withpotential sources of ignition such as hot water and spaceheaters, clothes dryers, electric motors, etc.DO NOT mix fuel and oil directly in fuel tank.Use of NMMA, <strong>TC</strong>-WII or <strong>TC</strong>-W3, JASO FB or JASO FCclassified oil is recommended.1. Be sure container is outdoors and in a well-ventilatedarea.2. Fill approved clean red GASOLINE container with 1/4of recommended fuel amount. See Table 1-4 andTable 1-5.3. Add required amount of recommended oil to fuel.See Table 1-4.4. Screw cap onto container.5. Shake container vigorously.6. Unscrew cap from container.7. Fill container with remainder of recommended fuel.See Table 1-4 and Table 1-5.8. Wipe away any spilled fuel or oil.Table 1-4. Fuel Mix Chart — Mixture Ratio 24:1U.S.S.I. MetricGas Oil Petrol Oil1 Gal. 5 oz. 4 Liters 167 ml2 Gal. 11 oz. 8 Liters 333 ml5 Gal. 27 oz. 20 Liters 833 mlTable 1-5. Recommended FuelFuel Component PercentageEthanol 10%Grain Alcohol (“Gasohol”) 10%MTBE (Methyl Tertiary Butyl Ether) 15%ETBE (Ethyl Tertiary Butyl Ether) 15%FUEL ADDITIVESOnly fuel additives such as Tecumseh's fuel stabilizer part # 730245A or liquid varieties can be used when mixedproperly. For winter applications, Isopropyl alcohol fuel dryers may be used in the fuel system but must be mixed atthe proper ratio recommended by the manufacturer. NEVER USE METHANOL BASED DRYERS.Gasoline and oil containers must be clean, covered, and rust-free. Old gas or fuel contamination can restrict or blockfuel filters, and small fuel ports and passages in the carburetor. If the engine is to be unused for 30 days or more see"Storage" for fuel system instructions.6
TUNE-UP PROCEDUREThe following is a minor tune-up procedure. If the engine does not perform properly after the tune-up is completed,consult the "Troubleshooting <strong>Engine</strong> Operation Chart" found in Chapter 7. Repair procedures are listed in each chapter.! CAUTIONRemove the spark plug wire before doing any service work on the engine.1. Service or replace the air cleaner as necessary. Use the applicable procedure found in Chapter 2 under"Service".2. Remove the fuel from the fuel tank by running the engine until stopping or draining into an approved fuelcontainer.3. Remove the fuel tank and blower housing to clean all debris from the air intake screen, cylinder cooling fins,governor and carburetor linkage.4. Replace the blower housing and check all remote linkage for proper adjustment and operation.5. Check to see that the engine is properly secured to the equipment. On rotary lawnmowers, balance the bladeand check the blade hub and crankshaft key for wear. Replace as necessary. Torque the bolts to the correctspecification.6. Replace the spark plug with the correct replacement by using the Master Parts Manual. Set the spark plug gapat .030" (.762 mm) and install it in the engine. Tighten the spark plug to 230 inch pounds (2.6 Nm) of torque. Ifa torque wrench isn't available, screw the spark plug in as far as possible by hand. Use a spark plug socket orwrench to turn the spark plug 1/8 to 1/4 turn further if using the old spark plug, or 1/2 turn further if a new sparkplug is used. Reinstall the spark plug wire.7. Fill the fuel tank with the proper fuel/oil mix.8. Start the engine and allow it run 3 - 5 minutes to reach operating temperature. Adjust the carburetor if necessary(see Chapter 3 under "Service" for the final idle mixture adjustment procedure) and set the engine R.P.M.(s)according to the specification number found on microfiche card # 30 or computer parts lookup system.7